I know there are already a few answers for password validation, but I have a different issue here.
I am following this answer
added my custom validation, but its depends on store_config value, like ...

I have product page where custom option are used of drop down type.There is a condition to extra checkbox validation when click it custom option should be required.I am looking to add custom jQuery ...

I am using this article to create custom condition in cart rule where I want to add the stock qty including other product attributes in rule condition.
For example
if product_attribute1 = Adidas and ...

I am absolutely new with Magento. Have basic knowledge with custom modules and front-end layout updates.
I need to insert a custom validation for the ZIP Code in my checkout page (One-page checkout). ...

In Magento 1, I used the below javascript code inside of a template to add my own validation rule:
// Add new validation class for the name. Also supports names with two hypen in the name e.g. Hans-...